Recently read some ideas and I thought "I wanna do that" So here goes
1) Decelerate
Appearance: Stop sign;The word stop is bolded
Occurrences: Semi Rare
Effect: Slows down zombies in area to walking pace. Zombies relatively close to where powerup was obtained are put in the "sleep mode" similar to when a emp is used on a zombie.
2) Replenish
Appearance: Stick Figure (like the one on the fire exits irl) flexing
Occurrences: Rare
Effect: 1 Player personal max ammo. However spawns a "boss" zombie or a horde of regular zombies to chase after the player who got it.
3) Lucky Spade
Appearance: Spade
Occurrences: Ultra Rare
Effects: The following powerup effects take place; Max Ammo, Carpenter, Nuke, Double Points, and Insta-Kill.